I have a vriable speed off brand that I got a harbor freight. I have used it for many things. I even have a router table and router bits for it. I made a bunch or really cool clocks one year as Christmas gifts. I have also used it to cut a barrel on a rifle. Turned out real nice too.

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Romans 1:16 I am not ashamed of the gospel, because it is the power of God for the salvation of everyone who believes: first for the Jew, then for the Gentile.

Is the one from harbor freight able to grind metal, an other gunsmithing stuff? I have a harbor freight down the road from me, thinking about going there sometime soon

Yes, Harbor Freights Dremel clones or any rotaries can handle light grinding jobs. Do yourself a favor and visit Harbor Freight!!!!!! Be sure you leave enough time browse, I've yet to go into there without coming out with something (usually with a tool I didn't know I needed ;-)). Last time it was a watch case opener, for $6 (never thought about buying one of those before). Tools are super cheap, and unless you need a professional quality tool, they get the job done, especially for this shadetree mechanic. They have a large selection of a bit of everything, enjoy.